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M. GANDY.

BELT FOR DRIVING MACHINERY.

Patented Mar. 3, 1885.

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llalllllll lllllllllllll'llllltllllll'ill made of woven fabric, the one being a hunt UNITED STATES MAURICE GANDY, OF LIVERPOOL, ENGLAND.

BELT FOR DRIVING MACHINERY.

SPECIFICATION forming part of Letters Patent No, 313,069, dated March 3, 1885.

Application filed July 17, 1884 (N0 model.)

To all whom, it may concern:

Be it known that I, MAURICE GANDY, a subject ofthe Queen of Great Britain, residing in Liverpool, England, have invented a certain new and useful Improvement in Belts for Driving Machinery, of which the following is a description in such full, clear, concise, and exact terms as will enable any one skilled in the art to which my invention appertains or with which it is most nearly connected to make and use the same, reference being had to the accompanying drawings, making part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of said drawings is a plan view of the belt, and Fig. 2 an edge view of the same.

There are two principal varieties of belts nated belt composed of several thicknesses or plies of canvas or duck folded and stitched together, the selvage of the canvas being turned inside of the belt in folding, making both edges of smooth folds,the other variety being known as a solid woven belt, consisting of several thicknesses or plies of warps and wefts laid and locked together by the loom during the operation of weaving. In the use of both varieties of these belts it is found that the dust and grit collect in the interstices of the fabric at the edges of the belt, causing them not only to cut the shifting forks or guides through which they run on the pulley, but also to destroy themselves by abrasion upon the forks, the effect being to cut creases in and form sharp edges on the forks or guides,which rapidly cut through the edges of the belt and ulti niately destroy it. To remedy this evil the edges of the belt have been bound with leather or other smooth-surfaced material having no interstices into which the dust or grit can collect, but this remedy is found to be worse than the evil, the effect being to thicken the belt at the edges, causing it to draw unequally on the pulley and to bite itself to pieces, owing to the crimping occasioned by running on the pulley, and especially small pulleys, the crimping increasing as the pulley decreases in diameter. 1

To overcome the evil effectually without add ing anything to the thickness of the belt or any part of it, I make a liquid cementhaving the qualities of smoothness and elasticity when hard and dry, andwith this cement, while in a liquid condition, I saturate the edges of the belt until the interstices of the fabric are full. Thus, when the cement has dried, the edges are made hard and smooth. I By these means the grit is prevented from lodging between the fibers and in the interstices of the fabric, and both the guide-forks and the belt are saved from destruction.

The liquid cement I use may be made of various ingredientsfor instance, equal parts of ordinary glue and isinglass dissolved in Vinegar, with or without the addition of shellac to harden it, or of guttapercha dissolved in any ordinary solventsuch as sulphide ofcarbo11 being the sizing or liquid cement used by leather-belt makers; but any other suitable cement having the qualities above mentioned may be substituted for the purpose.

I prefer to apply the cement while the fabric is still clean and as soon as the belt is woven or folded and stitched together, although it may be applied, but not with so good effect, after the belt has been treated with oil and paint.

The application of the cement is illustrated in the drawings by the heavy black lines at the edges of the belt.

Having thus described my inlproveinentin belts composed of woven fabric, I claim as new and desire to secure by Letters Patent An improved woven-fabric belt having its edges saturated with cement, whereby the interstices of the fabric are filled and the edges made hard and smooth, substantially as set forth, for the purpose stated.

MAURICE GANDY.

\Vitnesses:

GEORGE A. Best, HUGH HUGHES, ("lerlrs to Messrs. Stone, Fletcher 0t Hull, 80-

Zicitors, Liverpool. 

